Suitably arrange the information under the given headings. Evokes sensations. Coordinates the repeated movements during walking and running. Impulses from the different parts of the body are transmitted to and from the brain Coordinates muscular activities and maintains equilibrium of the body. Brain Spinal cord

The brain and spinal cord play an essential role in the coordination of the impulses in the body of a human. Neurons help to relay the stimulus between different parts of the body. The brain evokes sensations and coordinates muscular activities and maintains the equilibrium of the body. The spinal cord coordinates the repeated movements during walking and running and relays impulses from the different parts of the body are transmitted to and from the brain. Brain Spinal cord Evokes sensations. Coordinates the repeated movements during walking and running. Coordinates muscular activities and maintains equilibrium of the body. Impulses from the different parts of the body are transmitted to and from the brain

Redraw the diagram. Name and label the parts that perform the given functions. Maintains equilibrium of the body.

The cerebellum is located in the hindbrain below the cerebrum. The cerebrum, cerebellum, and medulla oblongata are located in alignment connecting to the spinal cord and hence controlling movements. This structure helps in the maintenance of posture, balance, and equilibrium in the body of a human.

Complete the table by selecting suitable items from the box : A B C Disease Alzheimer's Parkinsons Epilepsy Cause __(a)__ __(b)__ __(d)__ Symptom Loss of memory __(c)__ Epilepsy frothy discharge Excess blood is lost even through minor injuries Loss of body balance Accumulation of insoluble proteins in the neural tissues of brain Production of dopamine reduces Irregular flow of electric charges in brain

Alzheimer's disease can be characterised as a chronic neurodegenerative disease that typically starts slowly and gradually degenerates over time. The accumulation of insoluble proteins in the neural tissues of the brain is responsible for this phenomenon. The most common symptom of this disease involves difficulty in remembering recent events. Parkinson's disease can be characterised as a neural disorder. It is caused due to loss of the neurotransmitter dopamine. This disease causes loss of body balance in the body of a human. In epilepsy, the functioning of the brain and the nervous system becomes abnormal. It is a disorder of the nervous system. Symptoms of Epilepsy are continuous muscular contraction, frothy discharge from the mouth, clenching of the teeth following which the patient falls unconscious. This condition arises due to result of the disrupted electrical activity of the brain. A B C Disease Alzheimer's Parkinsons Epilepsy Cause Accumulation of insoluble proteins in the neural tissues of brain Production of dopamine reduces Irregular flow of electric charges in brain Symptom Loss of memory Loss of body balance Epilepsy frothy discharge

Redraw the diagram. Name and label the parts that perform the given functions. Controls heartbeat, breathing etc.

Medulla oblongata can be characterised as the foremost caudal brainstem structure situated within the posterior-most part of the brainstem merging with the medulla spinalis. It is located anterior to the cerebellum within the brain stem, inferior to the pons. This structure regulates the heartbeat, breathing, and other physiological functions in the body of an individual.

Analyse the illustration and answer the following questions : Are all accidental responses controlled by (iii) ? Explain with an example.

A reflex arc is a pathway that controls a reflex in the body of a human. Sensory neurons pass through the spinal cord as most of them do not pass directly into the brain. This helps for faster reflex action. It allows the spinal motor neurons to get activated without the delay of signals through the brain. In the given diagram (iii) represents the spinal cord. Not all accidental responses are controlled by the spinal cord. For example, when light falls on our eyes or any object moves towards our eye we normally close our eyes. This response is under the control of the cerebrum.

Identify the disease from the following, symptoms. Continuous muscular contraction Frothy discharge from the mouth Clenching of the teeth Patient falls unconscious.

In epilepsy, the functioning of the brain and the nervous system becomes abnormal. It is a disorder of the nervous system. Symptoms of Epilepsy are continuous muscular contraction, frothy discharge from the mouth, clenching of the teeth following which the patient falls unconscious. In this condition seizures usually last for 1-3 minutes and the seizures lasting more than five minutes are fatal.

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The stimulation of parasympathetic nerve causes dilation of the pupil of the eye.

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Important Questions on Sensations and Responses

HARD

Science>Biology>Sensations and Responses>Human Nervous System

Explain the Peripheral Nervous System.

EASY

Science>Biology>Sensations and Responses>Human Nervous System

Name the parts labelled as A, B, C and D.

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EASY

Science>Biology>Sensations and Responses>Human Nervous System

Redraw the diagram.
Name and label the parts that perform the given functions.

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Relay station of impulses.

EASY

Science>Biology>Sensations and Responses>Human Nervous System

Suitably arrange the information under the given headings.

Evokes sensations.
Coordinates the repeated movements during walking and running.
Impulses from the different parts of the body are transmitted to and from the brain
Coordinates muscular activities and maintains equilibrium of the body.